EP0090498A2 - Polyéthers fluorinés et dérivés - Google Patents

Polyéthers fluorinés et dérivés Download PDF

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Publication number
EP0090498A2
EP0090498A2 EP83301028A EP83301028A EP0090498A2 EP 0090498 A2 EP0090498 A2 EP 0090498A2 EP 83301028 A EP83301028 A EP 83301028A EP 83301028 A EP83301028 A EP 83301028A EP 0090498 A2 EP0090498 A2 EP 0090498A2
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EP
European Patent Office
Prior art keywords
formula
compound
integer
methyl
salt
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Granted
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EP83301028A
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German (de)
English (en)
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EP0090498A3 (en
EP0090498B1 (fr
Inventor
Ronald Earl Uschold
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EIDP Inc
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EI Du Pont de Nemours and Co
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Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
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Publication of EP0090498A3 publication Critical patent/EP0090498A3/en
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F16/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical
    • C08F16/12—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical by an ether radical
    • C08F16/14—Monomers containing only one unsaturated aliphatic radical
    • C08F16/26—Monomers containing oxygen atoms in addition to the ether oxygen
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
    • C07C41/01—Preparation of ethers
    • C07C41/18—Preparation of ethers by reactions not forming ether-oxygen bonds
    • C07C41/24—Preparation of ethers by reactions not forming ether-oxygen bonds by elimination of halogens, e.g. elimination of HCl
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C43/00—Ethers; Compounds having groups, groups or groups
    • C07C43/02—Ethers
    • C07C43/03—Ethers having all ether-oxygen atoms bound to acyclic carbon atoms
    • C07C43/04—Saturated ethers
    • C07C43/12—Saturated ethers containing halogen
    • C07C43/126—Saturated ethers containing halogen having more than one ether bond
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C43/00—Ethers; Compounds having groups, groups or groups
    • C07C43/02—Ethers
    • C07C43/03—Ethers having all ether-oxygen atoms bound to acyclic carbon atoms
    • C07C43/14—Unsaturated ethers
    • C07C43/17—Unsaturated ethers containing halogen
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/51—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by pyrolysis, rearrangement or decomposition
    • C07C45/54—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by pyrolysis, rearrangement or decomposition of compounds containing doubly bound oxygen atoms, e.g. esters
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
    • C07C45/65—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by splitting-off hydrogen atoms or functional groups; by hydrogenolysis of functional groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
    • C07C49/04—Saturated compounds containing keto groups bound to acyclic carbon atoms
    • C07C49/175—Saturated compounds containing keto groups bound to acyclic carbon atoms containing ether groups, groups, groups, or groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
    • C07C49/20—Unsaturated compounds containing keto groups bound to acyclic carbon atoms
    • C07C49/255—Unsaturated compounds containing keto groups bound to acyclic carbon atoms containing ether groups, groups, groups, or groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C59/00—Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
    • C07C59/125—Saturated compounds having only one carboxyl group and containing ether groups, groups, groups, or groups
    • C07C59/135—Saturated compounds having only one carboxyl group and containing ether groups, groups, groups, or groups containing halogen

Definitions

  • This invention relates to perfluoro[ w- (1,2-dihalotrifluoroethoxy)carboxylates], to functionally- substituted polyethers produced therefrom, including fluorinated olefins, and to polymers of the fluorinated olefins.
  • the olefins of the aforesaid formula generally can be prepared by pyrolyzing the corresponding acid fluoride over a basic salt.
  • the invention herein also resides in the fluorinated compounds of formulas 2 to 5, preferred embodiments of which include those wherein, in formulas 2 to 5, n is 1; in formula 2, X and X 1 are both Cl or X is OCH 3 and X 1 is H; and in formulas 4 and 5, p is 0 and X and X1 are both Cl or X is OCH 3 and X 1 is H .
  • the compound of formula 1 is obtained by pyrolyzing the salt of the formula wherein M is an alkali or alkaline earth metal of valence m and X 2 and X 3 are both Br; the compound of formula 2 is obtained by pyrolyzing the compound of formula 6 wherein M is as previously defined, X 2 and X 3 are both Cl , or X 2 is F or OR, as previously defined, and X 3 is H.
  • the compound of formula 3 is obtained by heating the compound of formula 2, wherein X and X 1 are both Cl, with magnesium or a mixture of zinc and zinc chloride.
  • the compound of formula 4 is obtained by reacting either of the compounds of formulas 2 and 3 with hexafluoropropene oxide (HFPO); the compound of formula 5 is obtained by pyrolysis of the compound of formula 4.
  • HFPO hexafluoropropene oxide
  • an aprotic solvent such as tetraglyme, although not essential, may be desirable, particularly as the value of n increases.
  • the reaction with bromine or chlorine is facilitated by cooling the reaction flask in ice and irradiating with UV light.
  • the reaction with the alkanol of the formula ROH is carried out in the presence of a small amount of an alkoxide ROM' wherein R is as defined above and M' is an alkali metal cation.
  • Methyl alcohol and ethyl alcohol are the preferred alcohols.
  • An excess of alcohol is nomally preferred.
  • the addition of hydrogen fluoride across the double bond does not proceed readily, but may be accomplished by nucleophilic addition of fluoride ion by means of an alkali metal fluoride such as potassium fluoride in a proton-donating liquid such as formamide.
  • the resultant ester is converted to the alkali metal or akaline earth metal salt of formula 6 by hydrolyzing with an alkali or alkaline earth metal hydroxide, preferably sodium hydroxide or potassium hydroxide, dissolved in water or, preferably, in methyl alcohol.
  • an alkali or alkaline earth metal hydroxide preferably sodium hydroxide or potassium hydroxide
  • the salt of formula 6 wherein X 2 is OR and X 3 is H can be prepared in one step from the aforesaid unsaturated ester by reaction with an alkanol ROH, wherein R is as defined above, in the presence of an alkali metal hydroxide, such as sodium hydroxide or potassium hydroxide, the hydroxide being present in slight molar excess with respect to the ester.
  • the salt, of formula 6 is isolated and pyrolyzed in a suitable aprotic solvent, such as a glyme (mono-, di-, trior tetraethyleneglycol dimethyl ether), preferably tetraglyme, at a temperature of about 130°C to about 300°C, preferably 170°C to 230°C.
  • a suitable aprotic solvent such as a glyme (mono-, di-, trior tetraethyleneglycol dimethyl ether), preferably tetraglyme
  • the solvent should be higher boiling than the pyrolysis reaction product, the compound of either formula 1 or formula 2.
  • the unhydrolyzed halogenated or alkanolated ester can be pyrolyzed in a suitable aprotic solvent, at the aforesaid temperatures, in the presence of a carbonate, phosphate, sulfite or sulfate salt of an alkali or alkaline earth metal, preferably sodium carbonate, trisodium phosphate or sodium sulfite, said unhydrolyzed halogenated or alkanolated ester being of the formula CF 2 X 2 CFX 3 O[CF 2 CF(CF 3 )O] n CF 2 CF 2 CO 2 R 1 wherein n is an integer and is 1 to 6, R 1 is methyl or ethyl and X 2 and X 3 are both Br or X 2 is OR wherein R is methyl, cyclohexyl, phenyl or alkyl of 2 to 6 carbon atoms optionally interrupted with ether oxygen and X 3
  • alkali or alkaline earth metal salt of formula 6 can be used, including evaporative removal of water, azeotropic distillation of water with toluene, and neutralization in methanol solution followed by evaporative removal of methanol. In all these methods final drying in a vacuum oven is required to ensure complete removal of water or methanol. Neutralization in methanol is preferred because less foam is generated in the drying process, and the lower boiling point and lower heat of vaporization of methanol relative to water increases the drying rate.
  • Solvents used in the pyrolysis of the salt are dried by standard methods for drying organic liquids; distillation from sodium hydride is convenient.
  • the salt of formula 6 is an alkali or alkaline earth metal salt.
  • Ammonium or tetraalkylammonium salts should be avoided, since their pyrolysis also leads to the formation of hydrogen-capped products or to the formation of alkyl esters.
  • Reaction pressure is not a critical variable for the pyrolysis of the salt of formula 6. Pressure above or below atmospheric pressure can be employed. Atmospheric or subatmospheric pressure is preferred, however, because of the comparative ease of recovering the distillable reaction products.
  • the pyrolysis of the salt of formula 6 wherein X 2 and X 3 are Br provides the bromo- functional perfluorovinyl ether of formula 1, along with a by-product of the formula CF2BrCFBrO[CF2CF(CF3)O]nCF2CF2Br wherein n is as defined above, shown in Example 4.
  • the by-product can be converted to the vinyl ether of formula 1 by heating in the presence of metallic zinc or magnesium, which selectively eliminates bromine from the 1,2-positions.
  • Such an elimination of bromine from fluorinated 1,2-dibromoalkanes is known, for example, from Hudlicky, supra, 2nd (Revised) edition, pages 482, 483.
  • the vinyl ether of formula 1 can be copolymerized with fluorinated olefins, for example, tetrafluoroethylene, chlorotrifluoroethylene, vinylidene fluoride and perfluoroalkylvinyl ethers wherein the alkyl moiety contains 1 to 4 carbon atoms.
  • fluorinated olefins for example, tetrafluoroethylene, chlorotrifluoroethylene, vinylidene fluoride and perfluoroalkylvinyl ethers wherein the alkyl moiety contains 1 to 4 carbon atoms.
  • the resulting copolymers, which contain pendant bromo groups, are curable to fluoroelastomers by means of peroxides and heat or by means of UV radiation.
  • the trifluoromethyl ketone of formula 2 wherein X and X 1 are both Cl can be dechlorinated to the monochlorodifluorovinyl ether of formula 3 by heating in the presence of magnesium or a mixture of zinc and zinc chloride in an aprotic solvent such as diglyme.
  • the vinyl ether 5 can be copolymerized with fluorinated olefins such as, for example, tetrafluoroethylene, chlorotrifluoroethylene, vinylidene fluoride, and/or perfluoroalkylvinyl ethers wherein the alkyl moiety contains 1 to 4 carbon atoms, the fluorinated copolymers being moldable into shaped articles.
  • fluorinated olefins such as, for example, tetrafluoroethylene, chlorotrifluoroethylene, vinylidene fluoride, and/or perfluoroalkylvinyl ethers wherein the alkyl moiety contains 1 to 4 carbon atoms, the fluorinated copolymers being moldable into shaped articles.
  • Copolymers prepared from the monomer of formula 5 wherein Q is CF 2 XCFX 1 , X is OR and X 1 is H can be further reacted by known methods to convert the pendant RO- group to another useful functional group, for example, an ester (R0 2 C-) or acyl fluoride (FOC-) group. Copolymers containing these groups are, after hydrolysis, water-wettable and dyeable and possess ion-exchange properties. The formation of the ester can be carried out in 96% sulfuric acid at 0°C to 10°C by the process of Hudlicky, supra, 2nd (Revised) edition, page 271. The formation of the acyl fluoride can be carried out by reaction of the vinyl ether monomer or a copolymer thereof with a selected metal halide, such as antimony pentafluoride.
  • a selected metal halide such as antimony pentafluoride.
  • the ketone of formula 2 also can be reacted, under basic conditions, optionally in the presence of a solvent, with glycol half-esters to form 1,3-dioxolanes by known methods, such as disclosed in United States Patent 2,925,424.
  • 1,3-dioxolanes can be converted to polymerizable fluorinated dioxoles.
  • A A 300 mL, 3-neck round-bottom flask fitted with a magnetic stirrer, pressure-equalizing dropping funnel and air-cooled condenser topped by a nitrogen bubbler, was flushed with nitrogen and charged with 117.5 g (0.28 mol) of methyl perfluoro-4,7-dioxa-5-methyl-8-nonenoate. Bromine was added with stirring and the reactant mixture was irradiated with a General Electric sunlamp. Bromine uptake was rapid. When a slight molar excess of bromine had been added, the flask was cooled in ice water. Excess bromine was destroyed by adding 20% aqueous sodium bisulfite solution. Two liquid layers were obtained.
  • the crude product was distilled to yield 6.1 g of pure material which was identified by its fluorine and proton nuclear magnetic resonance spectra, its infrared spectrum and its high resolution mass spectrum, all of which were consistent with the compound 1,1,1,3,3,5,6,6-octafluoro-5-H-2-oxo-4,7-'dioxsoctane, CH 3 OCF 2 CFHOCF 2 C(O)CF 3 , that is, the compound of formula 2 wherein X is methoxy, is X 1 hydrogen and n is one.
  • the salt was pyrolyzed in tetraglyme as described in Example 3.
  • the product was identified by its infrared and fluorine nuclear magnetic resonance spectrum and shown to be l,2-dichloro-perfluoro-3-oxa-5-oxohexane, CF 2 ClCFClOCF 2 C(O)CF 3 , that is, the compound of formula 2 wherein X and X 1 are both Cl and n is one.
  • Example 2 for the process of preparing the compound of formula 1
  • Example 4 for the compound of formula 2
  • Example 5 for the compound of formula 3
  • Example 7 for the acyl fluoride of formula 4.
  • the fluorinated ketone of formula 2 can be converted, by reaction with HFPO, followed by pyrolysis of the resulting adduct, to a vinyl ether monomer from which copolymers can be prepared which, after hydrolysis, are water-wettable and dyeable and possess ion-exchange properties.
  • the fluorinated ketone of formula 3 can be converted to a copolymerizable monomer by the procedure used for the ketone of formula 2; copolymers derived therefrom are moldable and can be cured to fluoroelastomers.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Polyethers (AREA)
EP83301028A 1982-03-02 1983-02-25 Polyéthers fluorinés et dérivés Expired EP0090498B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US353816 1982-03-02
US06/353,816 US4420638A (en) 1982-03-02 1982-03-02 Fluorinated ether-ketones

Publications (3)

Publication Number Publication Date
EP0090498A2 true EP0090498A2 (fr) 1983-10-05
EP0090498A3 EP0090498A3 (en) 1984-03-21
EP0090498B1 EP0090498B1 (fr) 1985-09-18

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EP83301028A Expired EP0090498B1 (fr) 1982-03-02 1983-02-25 Polyéthers fluorinés et dérivés

Country Status (5)

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US (1) US4420638A (fr)
EP (1) EP0090498B1 (fr)
JP (2) JPS58180449A (fr)
CA (1) CA1210024A (fr)
DE (1) DE3360814D1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0151885A2 (fr) * 1983-12-27 1985-08-21 E.I. Du Pont De Nemours And Company Procédé et intermédiaires pour un monomère vinylique fluoré
EP0167258A1 (fr) * 1984-05-23 1986-01-08 AUSIMONT S.p.A. Procédé de préparation de perfluoropolyéthers neutres et polyfonctionnels ayant un poids moléculaire contrôlé
EP0261501A2 (fr) * 1986-09-17 1988-03-30 Hoechst Aktiengesellschaft Ethers halogénés
WO2002020445A1 (fr) * 2000-09-01 2002-03-14 Asahi Glass Company, Limited Procede de preparation de composes insatures fluores et procede de production de polymeres fluores
EP1566374A1 (fr) 2004-01-29 2005-08-24 Solvay Solexis S.p.A. Procédé pour la préparation d' éthers fluorohalogénés

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3259317B2 (ja) * 1992-02-14 2002-02-25 日本メクトロン株式会社 パ−オキサイド加硫可能な含フッ素エラストマ−の製造方法
JP3360689B2 (ja) * 1992-06-26 2002-12-24 ダイキン工業株式会社 フッ素化ビニルエーテルの製造方法
JP4626118B2 (ja) * 1999-08-31 2011-02-02 旭硝子株式会社 ｖｉｃ−ジクロロ酸フルオリド化合物の製造方法
CA2524382A1 (fr) * 2003-06-18 2004-12-29 E. I. Du Pont De Nemours And Company Composes fluorocetones
AU2009262163B2 (en) * 2008-06-26 2015-07-09 Kci Licensing, Inc. Stimulation of cartilage formation using reduced pressure treatment and chondrocytes
JP7307586B2 (ja) * 2019-04-26 2023-07-12 東ソー株式会社 パーフルオロ（２，４－ジメチル－２－フルオロホルミル－１，３－ジオキソラン）の製造方法
JP7307587B2 (ja) * 2018-09-03 2023-07-12 東ソー株式会社 ヘキサフルオロプロピレンオキシドへのアルデヒド類付加体、およびトリフルオロピルビン酸フルオリドダイマーの製造方法
US11555024B2 (en) 2018-09-03 2023-01-17 Tosoh Corporation Aldehyde adduct of hexafluoropropylene oxide, method of manufacturing trifluoropyruvyl fluoride dimer and method of manufacturing perfluoro(2,4-dimethyl-2-fluoroformyl-1,3-dioxolane)
WO2020050249A1 (fr) * 2018-09-03 2020-03-12 東ソ－株式会社 Produit d'addition d'aldéhyde à l'oxyde d'hexafluoropropylène, procédé de production d'un dimère de fluorure de trifluoropyruvate, et procédé de production de perfluoro (2,4-diméthyl-2-fluoroformyl -1,3-dioxolane)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1238458B (de) * 1963-08-13 1967-04-13 Du Pont Verfahren zur Herstellung von Fluoralkylvinylaethern
US3574770A (en) * 1968-10-24 1971-04-13 Nasa Hydroxy terminated perfluoro ethers
US3994861A (en) * 1975-09-04 1976-11-30 The United States Of America As Represented By The Secretary Of The Air Force Long chain-perfluoroalkylene ether bibenzoxazole polymers
DE1668589B2 (de) * 1967-03-07 1977-06-08 EJ. du Pont de Nemours and Co., Wilmington, Del. (V.StA.) Perfluorierte aether und verfahren zu deren herstellung
DE1668395B2 (de) * 1966-07-11 1977-10-06 Montecatini Edison SpA, Mailand (Italien) Perfluorierte ketone und verfahren zu deren herstellung
EP0041739A2 (fr) * 1980-06-11 1981-12-16 The Dow Chemical Company Préparation de fluorures d'acides fluorés; préparation de correspondants acides, amides ou esters; copolymérisation d'éthers vinyliques fluorés

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Publication number Priority date Publication date Assignee Title
US2925424A (en) * 1956-05-03 1960-02-16 Du Pont Fluoroketals and their preparation
US3274239A (en) * 1962-08-31 1966-09-20 Du Pont Fluorocarbon ethers
US3351619A (en) * 1966-08-01 1967-11-07 Du Pont Crosslinkable polymers formed from iodine-containing perfluoroalkyl vinyl ethers
US3311658A (en) * 1966-08-01 1967-03-28 Du Pont Fluorocarbon ethers containing iodine
US3865845A (en) * 1971-02-24 1975-02-11 Paul Raphael Resnick Fluorinated dioxoles
US3978030A (en) * 1973-08-01 1976-08-31 E. I. Du Pont De Nemours And Company Polymers of fluorinated dioxoles
US4035565A (en) * 1975-03-27 1977-07-12 E. I. Du Pont De Nemours And Company Fluoropolymer containing a small amount of bromine-containing olefin units
US4131740A (en) * 1977-04-20 1978-12-26 E. I. Du Pont De Nemours And Company Alkyl perfluoro-ω-fluoroformyl esters and their preparation
US4275226A (en) * 1978-08-25 1981-06-23 Asahi Glass Company, Ltd. Process for producing fluorovinyl ether
US4271275A (en) * 1979-12-14 1981-06-02 E. I. Du Pont De Nemours And Company Fluoroelastomer composition containing oxirane acid acceptor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1238458B (de) * 1963-08-13 1967-04-13 Du Pont Verfahren zur Herstellung von Fluoralkylvinylaethern
DE1668395B2 (de) * 1966-07-11 1977-10-06 Montecatini Edison SpA, Mailand (Italien) Perfluorierte ketone und verfahren zu deren herstellung
DE1668589B2 (de) * 1967-03-07 1977-06-08 EJ. du Pont de Nemours and Co., Wilmington, Del. (V.StA.) Perfluorierte aether und verfahren zu deren herstellung
US3574770A (en) * 1968-10-24 1971-04-13 Nasa Hydroxy terminated perfluoro ethers
US3994861A (en) * 1975-09-04 1976-11-30 The United States Of America As Represented By The Secretary Of The Air Force Long chain-perfluoroalkylene ether bibenzoxazole polymers
EP0041739A2 (fr) * 1980-06-11 1981-12-16 The Dow Chemical Company Préparation de fluorures d'acides fluorés; préparation de correspondants acides, amides ou esters; copolymérisation d'éthers vinyliques fluorés
EP0072579A1 (fr) * 1980-06-11 1983-02-23 The Dow Chemical Company Préparation de fluorures d'acides fluorés

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0151885A2 (fr) * 1983-12-27 1985-08-21 E.I. Du Pont De Nemours And Company Procédé et intermédiaires pour un monomère vinylique fluoré
EP0151885A3 (en) * 1983-12-27 1985-09-18 E.I. Du Pont De Nemours And Company Process and intermediates for fluorinated vinyl ether monomer
EP0167258A1 (fr) * 1984-05-23 1986-01-08 AUSIMONT S.p.A. Procédé de préparation de perfluoropolyéthers neutres et polyfonctionnels ayant un poids moléculaire contrôlé
EP0261501A2 (fr) * 1986-09-17 1988-03-30 Hoechst Aktiengesellschaft Ethers halogénés
EP0261501A3 (en) * 1986-09-17 1989-10-25 Hoechst Aktiengesellschaft Halogen-containing ethers
WO2002020445A1 (fr) * 2000-09-01 2002-03-14 Asahi Glass Company, Limited Procede de preparation de composes insatures fluores et procede de production de polymeres fluores
EP1566374A1 (fr) 2004-01-29 2005-08-24 Solvay Solexis S.p.A. Procédé pour la préparation d' éthers fluorohalogénés
US7319173B2 (en) 2004-01-29 2008-01-15 Solvay Solexis S.P.A. Process for preparing fluorohalogenethers

Also Published As

Publication number Publication date
EP0090498A3 (en) 1984-03-21
JPS58180449A (ja) 1983-10-21
CA1210024A (fr) 1986-08-19
JPH0525081A (ja) 1993-02-02
US4420638A (en) 1983-12-13
JPH0446254B2 (fr) 1992-07-29
DE3360814D1 (en) 1985-10-24
EP0090498B1 (fr) 1985-09-18
JPH0627086B2 (ja) 1994-04-13

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